Creating Stuffed Bell Peppers is easy when you follow these steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Peppers: Cut the tops off the bell peppers and remove the seeds and membranes. Set aside.
3. Cook the Filling: In a skillet over medium heat, cook the chopped onion until translucent. Add the ground meat and cook until browned. Drain excess fat if necessary.
4. Mix the Filling: In a large bowl, combine the cooked meat, cooked rice, diced tomatoes, garlic powder, and season with salt and pepper to taste. Mix well.
5. Stuff the Peppers: Fill each bell pepper with the meat and rice mixture, pressing down gently to ensure they are packed.
6. Top with Cheese: Sprinkle shredded cheese on top of each stuffed pepper.
7. Bake: Place the stuffed peppers upright in a baking dish. Add a splash of water to the bottom of the dish to prevent drying out. Cover with foil and bake for 30 minutes.
8. Uncover and Finish Baking: Remove the foil and bake for an additional 5-10 minutes, until the cheese is bubbly and golden.
9. Let Cool: Allow the stuffed peppers to cool for a few minutes before serving.

These simple steps will guide you in creating delicious stuffed bell peppers that are sure to impress!